56613018 has 64 divisors (see below), whose sum is σ = 141990912. Its totient is φ = 14618880.

The previous prime is 56612993. The next prime is 56613019. The reversal of 56613018 is 81031665.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56613019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130530 + ... + 130962.

It is an arithmetic number, because the mean of its divisors is an integer number (2218608).

Almost surely, 2^56613018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56613018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70995456).

56613018 is an abundant number, since it is smaller than the sum of its proper divisors (85377894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56613018 is a wasteful number, since it uses less digits than its factorization.

56613018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 56613018 is about 7524.1622789517. The cubic root of 56613018 is about 383.9771986244.

The spelling of 56613018 in words is "fifty-six million, six hundred thirteen thousand, eighteen".